TrulyInbox Platform

Warm-up infrastructure for outbound at scale

The deliverability layer behind agencies running hundreds of inboxes and platforms embedding warm-up into their products. Don't build it. Embed it.

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40,000+ inboxes in network95%+ deliverability0.004% Pool Bounce Rate
cURLNodePython
curl -X POST https://api.trulyinbox.com/v1/inboxes \
  -H "Authorization: Bearer $TRULYINBOX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "email": "alex@yourdomain.com",
    "provider": "google",
    "warmup_strategy": "gradual",
    "daily_limit": 40
  }'
{
  "inbox_id": "inbox_9k2mxp7q",
  "status": "warming",
  "score": 72
}
# → Inbox warming. Reputation scores stream via webhook.

40,000+

Real inboxes warming on day one.

All ESPs

Google, Microsoft, Yahoo, Zoho, and more.

96%+

Average deliverability across the network.

Built for two audiences

One platform, two ways to use it

Whether you're an agency managing hundreds of client inboxes or a SaaS product embedding warm-up — we have you covered.

Manage hundreds of client inboxes without clicking through a dashboard

Programmatic management, push deliverability scores to client reports, bulk pause and resume, and webhook integration — all from the same API.

“Adding 200 client inboxes used to take a full day. Now it's a script that runs in minutes.”

Bulk inbox management

Connect, pause, and resume hundreds of inboxes with a single API call.

Real-time webhook events

Score changes, recovery alerts, and daily summaries delivered instantly.

Client-ready reporting

Push deliverability scores directly into your client dashboards.

Get API access
Build vs. Embed

Why teams stop building warm-up in-house

The honest math behind buy-vs-build for outbound infrastructure. We've seen these numbers from teams that started one path and switched.

Reality check
Build it yourself
TrulyInbox Network
Time to ship
9–18 months
2–6 weeks
Engineering team needed
3–5 dedicated engineers
1 integrator, part-time
Warm-up network
Build from zero
40,000+ inboxes on day one
ESP coverage
Build per provider
Google, Microsoft, Yahoo, Zoho ready
Deliverability tuning
Years of trial-and-error
7+ years already done
Ongoing maintenance
Continuous engineering cost
Included in contract
Capabilities

Everything you'd build, already built

A complete warm-up stack exposed through clean REST endpoints and webhooks.

Inbox lifecycle

Connect, configure, pause, resume, and remove inboxes across Google, Microsoft, Yahoo, Zoho, SMTP, and more.

Reputation scoring

Live deliverability scores updated continuously. ESP-by-ESP breakdowns. 90-day historical data.

Webhook events

Real-time events for status changes, score thresholds, recovery alerts, and daily summaries.

Smart reply network

Conversational warm-up across our network of 40,000+ inboxes. Spam rescue 24/7.

White-label UI

Embed warm-up scores as iframe widgets, or build custom UI on our data API.

Security & privacy

OAuth 2.0 throughout, encrypted at rest and in transit. Data residency on Enterprise.

Why TrulyInbox

Built for agencies and cold outbound tools.

We've been running warm-up at scale for years. Now we're opening the same infrastructure to anyone who needs it.

40K+

Active inboxes warming on the network

96%+

Average deliverability across the network

99.9%

Platform uptime, last 12 months

7+ yrs

Running outbound infra at Saleshandy

Agencies on TrulyInbox

Built for outbound at agency scale

From lead-gen shops running 50 inboxes to enterprise agencies with 1,000+ — here's what teams say after switching.

“We manage warm-up for 280+ client inboxes across 40 brands. Our ops team used to spend 20+ hours a week clicking through dashboards. Now it's a script that runs at 6am — and the deliverability reports drop straight into our client decks.”
AKFounder, B2B outbound agency
“Adding a new client used to mean four hours of inbox setup, three platforms, and someone watching the dashboard. With the API, we automated the entire onboarding into a Slack workflow. Clients now go live the same day they sign.”
MROperations Lead, lead-gen agency — 600+ inboxes
“We migrated 320 client inboxes over a weekend with zero downtime. The webhook events let our internal dashboard show client-by-client deliverability in real time. We don't even tell clients we use TrulyInbox — that's the whole point.”
SLDirector of RevOps, white-label outbound agency
Pricing

When plans aren't enough, we build a contract

API access is included in every TrulyInbox plan. The options below are for teams that need embed, white-label, custom SLAs, or contract-grade volume.

Already have an inbox or two? Standard plans include full API access. Starts at $19/month. Connect, automate, monitor — without a sales call.

See plans →
Most Common

Platform

For SaaS products and ESPs embedding warm-up into their stack.

Custom

Volume-based, contract-driven

  • Everything in standard plans
  • White-label & co-brand options
  • Iframe widgets + custom UI APIs
  • Higher rate limits & contract volume
  • Dedicated solutions engineer
  • 99.95% uptime SLA
Talk to platform sales

Enterprise

For ESPs and large platforms with custom infrastructure and compliance needs.

Let's talk

Built around your stack

  • Everything in Platform
  • Dedicated IP pools
  • Data residency (US, EU, custom)
  • 99.99% uptime SLA
  • Custom DPA & security review
  • Named CSM + 24/7 support
Contact sales
Frequently asked

Questions teams ask before signing

TrulyInbox runs a network of 40,000+ active inboxes across Google, Microsoft, Yahoo, and Zoho. Connected inboxes join the network — sending and receiving conversational emails, marking spam-foldered messages as important, and building reputation signals ESPs trust. Background, automatic.

Ready to embed warm-up?

Read the docs, build a prototype with sandbox access, and talk to our team when you're ready to go to production. We'll match your timeline.

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